Besides USPC and Burt, what companies, if any, made chips (for casino, club and private use). I am not talking about companies that added a hot stamp to an already produced blank.

Prior to the early to mid 1940's was there a maker of clay poker chips in the US besides USPC?

I have some crest and seals that were made prior to 1910 (chip on the left: 7/21/1896) that look quite a bit different than the typical USPC c&s (chip on the right). I wonder if the USPC chip making process evolved or was there another maker of chips prior to 1910.